The launch day countdown began at 4:07 a.m. EST this morning as teams reported to stations in preparation for today's launch of Orbital Sciences' Orbital-1 cargo resupply mission to the International Space Station. Orbital is targeting a 1:07 p.m. launch from the Mid-Atlantic Regional Spaceport Pad 0A at NASA's Wallops Flight Facility in eastern Virginia.

Dr. Jeff Goldstein, Director of the National Center for Earth and Space Science Education, discusses the student experiments being flown to the International Space Station aboard the Orbital Sciences Cygnus vehicle.

Teams for Orbital Sciences and NASA have given a "go" to proceed toward a planned 1:07 p.m. EST launch of Orbital's Antares rocket and Cygnus spacecraft for the Orbital-1 cargo resupply mission to the International Space Station. Cygnus is on internal power. All systems and the range are green.

Orbital Sciences Corporation's Antares rocket launched from Pad 0A at the Wallops Flight Facility, Va. to send the company's Cygnus cargo ship on a its first supply mission to the International Space Station. Cygnus is delivering 1.5 tons of provisions and experiments to the Expedition 38 crewmembers living on the ISS. Upon its arrival at the station, Cygnus will be captured with the station's Canadarm2 robotic arm and berthed to the Earth-facing port of the Harmony module, where it will remain for more than a month.

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NASA Television Airs Post Launch Status Briefing for Resupply Mission to Space Station

NASA TV aired a post-launch news briefings from Wallops Flight Facility to update the status of Orbital Sciences' Cygnus spacecraft and Orbital's mission to resupply the International Space Station . Cygnus is carrying 2,780 pounds of supplies to the space station, including vital science experiments that will expand the research capabilities of the Expedition 38 crew members aboard the orbiting laboratory. Upon its arrival at the station, Cygnus will be captured with the station's Canadarm2 robotic arm and berthed to the Earth-facing port of the Harmony module, where it will remain for more than a month.